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E20
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Lennox Industries Inc.
Dallas, Texas, USA
RETAIN THESE INSTRUCTIONS
FOR FUTURE REFERENCE
These instructions are intended as a general guide and do
not supersede local codes in any way. Consult authorities
having jurisdiction before installation.
WARNING
Improper installation, adjustment, alteration, service or
maintenance can cause personal injury, loss of life, or
damage to property.
Installation and service must be performed by a licensed
professional installer (or equivalent) or a service agency.
IMPORTANT
The Clean Air Act of 1990 bans the intentional venting of
refrigerant (CFCs, HCFCs and HFCs) as of July 1, 1992.
Approved methods of recovery, recycling or reclaiming
must be followed. Fines and/or incarceration may be
levied for noncompliance.
IMPORTANT
This unit must be matched with an indoor coil as speci-
fied in Lennox XC14 Engineering Handbook. Coils pre-
viously charged with HCFC−22 must be flushed.
NOTICE TO INSTALLER
UNIT PLACEMENT
It is critical for proper unit operation to place outdoor unit on an
elevated surface as described in Unit Placement section on page 7.
BRAZING LINE SET TO SERVICE VALVES
It is imperative to follow the brazing technique illustrated starting on
page 12 to avoid damaging the service valve's internal seals.
07/
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*2P0711*
INSTALLATION
INSTRUCTIONS
®
Elite
Series XC14 Units
AIR CONDITIONER
506636−01
07/11
Supersedes 11/10
TABLE OF CONTENTS
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General
The XC14 Air Conditioners, which will also be referred to in
this instruction as the outdoor unit, uses HFC−410A
refrigerant. This outdoor unit must be installed with a
matching indoor unit and line set as outlined in the Lennox
XC14 Engineering Handbook.
Shipping and Packing List
Check the unit for shipping damage and listed times below
are intact. If damaged, or if parts are missing, immediately
contact the last shipping carrier.
1
Assembled outdoor unit.
1
Refrigerant flow control (RFC) kit (Fixed Orifice)
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506636−01
*P506636-01*
Litho U.S.A.
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Table of Contents
Related Manuals for Lennox Elite XC14−018−230
Summary of Contents for Lennox Elite XC14−018−230
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Page 1: Table Of Contents
HFC−410A viously charged with HCFC−22 must be flushed. refrigerant. This outdoor unit must be installed with a matching indoor unit and line set as outlined in the Lennox NOTICE TO INSTALLER XC14 Engineering Handbook. -
Page 2: Unit Dimensions
Unit Dimensions − Inches (mm) LIQUID LINE CONNECTION ELECTRICAL INLETS SUCTION LINE CONNECTION 4−3/4" 4−1/2" (121) (108) TOP VIEW SIDE VIEW UNIT SUPPORT UNIT SUPPORT FEET FEET 8−1/2" 9−1/2" (216) (241) 8−3/4 8−1/4" (222) (210) 5−1/2" 13−1/2" (140) (343) XC14−024 TO −060 BASE WITH XC14−018 BASE SECTION ELONGATED LEGS XC14 Dimensions −... -
Page 3: Typical Unit Parts Arrangement
Typical Unit Parts Arrangement CONTROL PANEL SINGLE POLE CONTACTOR−1POLE (K1−1) GROUND LUG DUAL RUN CAPACITOR (C12) THERMAL PROTECTION SWITCH (S173) (ONLY ON −036 AND −060) SWITCH COVER COMPRESSOR DISCHARGE LINE COMPRESSOR HARNESS MUFFLER THERMAL PROTECTION SWITCH (S5) CRANKCASE HEATER THERMO- STAT (S40) (−041, −047, −048 AND −060 UNITS ONLY) LIQUID LINE FILTER... -
Page 4: Operating Gauge Set And Service Valves
Using an Allen wrench rated at less than 50Rc risks rounding or breaking off the wrench, or stripping the valve stem recess. See the Lennox Service and Application Notes #C−08−1 for further details and information. Page 4 506636−01... - Page 5 Operating Angle Type Service Valve: 1. Remove stem cap with an appropriately sized wrench. 2. Use a service wrench with a hex−head extension (3/16" for liquid line valve sizes and 5/16" for vapor line valve sizes) to back the stem out counterclockwise as far as it will go. SERVICE PORT CAP SERVICE PORT CORE (VALVE STEM SHOWN...
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Page 6: Recovering Refrigerant From Existing System
Recovering Refrigerant from Existing System DISCONNECT POWER CONNECT MANIFOLD GAUGE SET Disconnect all power to the existing outdoor unit at the disconnect Connect a gauge set, clean recovery cylinder and a recovery switch or main fuse box/breaker panel. machine to the service ports of the existing unit. Use the instructions provided with the recovery machine to make the connections. -
Page 7: Unit Placement
CLEARANCE ON ALL SIDES INCHES (MILLIMETERS) 6 (152) ACCESS PANEL MINIMUM CLEARANCE NOTES: ABOVE UNIT CONTROL PANEL Clearance to one of the other three ACCESS LOCATION sides must be 36 inches (914mm). 30 (762) 12 (305) Clearance to one of the remaining two sides may be 12 inches (305mm) and the final side may be 6 inches (152mm). - Page 8 DETAIL A Outside Unit Placement DETAIL B Slab Mounting at Ground Level Install unit away from windows. Install unit level or, if on a slope, maintain slope tolerance of two (2) degrees (or two inches per five feet [50 mm per 1.5 m]) away from building structure.
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Page 9: Removing And Installing Panels
ROOF MOUNTING Removing and Installing Panels IMPORTANT Install the unit a minimum of 6 inches (152 mm) above the roof surface to avoid ice build−up around the unit. Locate the unit above a load bearing wall or area of the roof that Do not allow panels to hang on unit by top tab. -
Page 10: New Or Replacement Line Set
Lennox Technical Support Product Applications for IMPORTANT assistance. Lennox highly recommends changing line set when To obtain the correct information from Lennox, be sure to converting the existing system from HCFC−22 to communicate the following information: HFC−410A. If that is not possible and the line set is the Model (XC14) and size of unit (e.g. - Page 11 Line Set Isolation The following illustrations are examples of proper refrigerant line set isolation: REFRIGERANT LINE SET INSTALLING REFRIGERANT LINE SET TRANSITION VERTICAL RUNS (NEW CONSTRUCTION SHOWN) FROM VERTICAL TO HORIZONTAL NOTE Insulate liquid line when it is routed through areas where the surrounding ambient temperature could become higher than the temperature of the liquid line or when pressure drop is equal to or greater ANCHORED HEAVY NYLON...
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Page 12: Brazing Connections
Brazing Connections IMPORTANT Use the procedures outline in figures 8 and 9 for brazing line set connections to service valves. Connect gauge set low pressure side to vapor line service valve and repeat procedure starting at WARNING paragraph 4 for brazing the liquid line to service port valve. - Page 13 CAP AND CORE REMOVAL CUT AND DEBUR Cut ends of the refrigerant lines square (free from nicks or dents) Remove service cap and core from and debur the ends. The pipe must remain round. Do not crimp end both the suction / vapor and liquid line of the line.
- Page 14 WRAP SERVICE VALVES To help protect service valve seals during brazing, wrap water saturated cloths around service valve bodies and copper tube stubs. Use additional water saturated cloths underneath the valve body to protect the base paint. FLOW NITROGEN Flow regulated nitrogen (at 1 to 2 psig) through the refrigeration gauge set into the valve stem port connection on the liquid service valve and out of the suction / vapor valve stem port.
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Page 15: Flushing Line Set And Indoor Coil
Flushing Line Set and Indoor Coil TYPICAL EXISTING FIXED ORIFICE TYPICAL EXISTING EXPANSION VALVE REMOVAL REMOVAL PROCEDURE (UNCASED PROCEDURE (UNCASED COIL SHOWN) COIL SHOWN) STUB END TWO PIECE PATCH PLATE LIQUID LINE EXPANSION DISTRIBUTOR TUBES (UNCASED COIL ONLY) ORIFICE VALVE LIQUID LINE ORIFICE HOUSING HOUSING DISTRIBUTOR... -
Page 16: Installing Indoor Metering Device
Installing Indoor Metering Device This outdoor unit is designed for use in systems that use See the Lennox XC14 Engineering Handbook for either fixed orifice or expansion valve metering devices at approved expansion valve kit match−ups. The expansion the indoor coil. -
Page 17: Leak Test Line Set And Indoor Coil
Take care to empty all existing traps. Polyol ester (POE) oils are used in Lennox units charged with HFC−410A WARNING refrigerant. Residual mineral oil can act as an insulator, preventing proper heat transfer. It can also Refrigerant can be harmful if it is inhaled. -
Page 18: Evacuating Line Set And Indoor Coil
Evacuating Line Set and Indoor Coil CONNECT GAUGE SET HIGH NOTE Remove cores from service valves (if not already done). Connect low side of manifold gauge set with 1/4 SAE in−line tee to vapor line service valve Connect high side of manifold gauge OUTDOOR set to liquid line service valve MANIFOLD... -
Page 19: Electrical
temperatures and pressures present during operation of IMPORTANT an air conditioning system. Non−condensables and water suction combine with refrigerant to produce substances Use a thermocouple or thermistor electronic vacuum that corrode copper piping and compressor parts. gauge that is calibrated in microns. Use an instrument Electrical capable of accurately measuring down to 50 microns. - Page 20 XC13 XC13 XC13 XC13 XC13 XC13 XC13 NOTE − Refer to furnace, blower coil and accessory instructions for additional wiring configurations with other optional controls. Figure 14. 24VAC Control Wiring Diagrams (Field Installed) DUAL RUN CAPACITOR (C12) FAN MOTOR (B4) CONTACTOR THERMAL PROTECTION SWITCH (S5)
- Page 21 DUAL RUN FAN MOTOR (B4) CAPACITOR (C12) CONTACTOR K1 GROUND LUG HIGH PRESSURE SWITCH (S4) COMPRESSOR (B1) CRANKCASE HEATER (HR1) THERMAL PROTECTION SWITCH (S5 OR S173) CRANKCASE THERMOSTAT (S40) Figure 16. Typical Factory Wiring Diagram (Interlink Compressor) Page 21 XC14 SERIES...
- Page 22 Figure 17. Typical Unit Wiring Diagram Page 22 506636−01...
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Page 23: Servicing Units Delivered Void Of Charge
1. Rotate fan to check for binding. Servicing Units Delivered Void of Charge 2. Inspect all factory− and field−installed wiring for loose If the outdoor unit is void of refrigerant, clean the system connections. using the procedure described below. 3. After evacuation is complete, open both the liquid and 1. - Page 24 DETERMINING CHARGE METHOD START: Determine how refrigerant is metered WHEN TO CHARGE? Which indoor metering Warm weather best device? Can charge in colder weather CHARGE METHOD? Determine by: FIXED Metering device type ORIFICE Outdoor ambient temperature 40ºF 39ºF 64ºF 65ºF REQUIREMENTS: (4.4ºC) and (3.8ºC) and...
- Page 25 CHECKING AIR FLOW AT INDOOR COIL Check airflow using the Delta−T ( process using the illustration in figure 20. 1. Determine the desired DT Measure entering air temper- Temp. 24 24 24 23 23 22 22 22 20 19 18 17 16 15 ature using dry bulb (A) and wet bulb (B).
- Page 26 1. Connect gauge set as illustrated in figure 18. 65ºF START: Measure outdoor ambient temperature 2. Confirm proper airflow across coil using figure 20. 3. Compare unit pressures with table 4, Normal ABOVE Operating Pressures. USE WEIGH-IN METHOD DO NOT CHARGE UNIT 4.
- Page 27 1. Confirm proper airflow across coil using figure 20. 40ºF START: Measure outdoor ambient temperature 2. Compare unit pressures with table 4, Normal Operating Pressures. ABOVE 3. Use SUPERHEAT to correctly charge unit or to USE WEIGH-IN METHOD verify the charge is correct. Weigh-in or remove refrigerant ABOVE or 4.
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Page 28: System Operation
Table 4. Normal Operating Pressures (Liquid +10 and Suction +5 psig) Use this table to perform maintenance checks; it is not a procedure for charging the system. Minor variations in these pressures may be due to differences in installations. IMPORTANT Significant deviations could mean that the system is not properly charged or that a problem exists with some component in the system. -
Page 29: Maintenance
3. Check blower drive belt for wear and proper tension. clean, moisture−free system. A replacement filter drier is 4. Check all wiring for loose connections available from Lennox. Refer to Lennox Repair Part 5. Check for correct voltage at unit (blower operating). Program. -
Page 30: Start−Up And Performance Checklist
NOTE If you are unsure about the filter required for your Verify room thermostat settings are correct. system, call your Lennox dealer for assistance. Verify that all electrical disconnect switches are ON. 3. Reusable Filter Many indoor units are equipped Check for any blown fuses or tripped circuit breakers.